Destroy all Planets (1968)

A Japanese sci-fi from 1968. Aliens called the Virans attempt to conquer Earth by sending a spaceship named Spaceship One to attack it. This effort is foiled by Gamera, who destroys Spaceship One. However, the Virans return with Spaceship Two and take control of Gamera by impanting a device on the back of his head. Then they send him to destroy Japan.